clinton has been recovering at home from aen concussion. an aide tells us she's looking forward to resuming her schedule. >>> we're going to turn this evening now to the nation's increasingly divisive gun control debate, just a day after we showed you this scene in los angeles. people lining up in their cars to participate in a one-day gun buy-back program. that etch fort brought in more than 2,000 firearms in exchange for gift certificates. but barely two weeks after the newtown, connecticut, school shootings, another debate heating up about whether to bring guns into schools. a new poll suggests 64% of americans think arming at least one school official would be at least some what effective. but what about arming the teachers? abc's cecilia vega tonight with some of those teachers who say yes. >> okay, so, now what do i do? >> reporter: the gun is fake, but these utah teachers fear the threat facing their classrooms is very real. today, 200 of those teachers became students -- >> ready to fire. >> reporter: packing a conference room on th